# Member of Technical Staff (Machine Learning Research Engineer) at Perplexity

- Company: Perplexity
- Status: Open
- Workplace: On-site
- Location: Berlin
- Level: Staff
- Discipline: AI & ML
- Employment: Full-time
- Posted: 2026-09-24
- Skills: Python, TensorFlow, PyTorch, Scikit-learn, Keras
- Apply: https://www.arbeitnow.com/jobs/companies/perplexity/member-of-technical-staff-machine-learning-research-engineer-berlin-482658

## Description

Perplexity is seeking an experienced Machine Learning Research Engineer to help build the next generation of advanced search technologies, with a focus on retrieval and ranking.
 Responsibilities 
 • Relentlessly push search quality forward — through models, data, tools, or any other leverage available
• Architect and build core components of the search platform and model stack
• Design, train, and optimize large-scale deep learning models using frameworks like PyTorch, leveraging distributed training (e.g., PyTorch Distributed, DeepSpeed, FSDP) and hardware acceleration, with a focus on retrieval and ranking models
• Conduct advanced research in representation learning, including contrastive learning, multilingual, and multimodal modeling for search and retrieval
• Deploy models — from boosting algorithms to LLMs — in a scalable and performant way
• Build and optimize RAG pipelines for grounding and answer generation
• Collaborate with Data, AI, Infrastructure, and Product teams to ensure fast and high-quality delivery
 Qualifications 
 • Deep understanding of search and retrieval systems, including quality evaluation principles and metrics
• Proven track record with large-scale search or recommender systems
• Strong proficiency with PyTorch, including experience in distributed training techniques and performance optimization for large models
• Expertise in representation learning, including contrastive learning and embedding space alignment for multilingual and multimodal applications
• Strong publication record in AI/ML conferences or workshops (e.g., NeurIPS, ICML, ICLR

More Perplexity roles: https://deviantjobs.com/companies/perplexity